public class Test extends Base{

    public int a = 10;
    public int c = 3;

    public void fun() {
        System.out.println(super.a);
        System.out.println(this.a);
        System.out.println(a);

        System.out.println("============");

        System.out.println(super.b);
        System.out.println(this.b);
        System.out.println(b);

        System.out.println("============");

        System.out.println(c);
        System.out.println(this.c);

        System.out.println(d);
    }

    public static void main(String[] args) {
        Test base1 = new Test();
        base1.fun();
    }
}